Render Samples missing?
Blender has been made so that he displays the samples progression only when he renders one tile at the same time.
(Or if you check the "progressive refine" option as you force blender to render the entire picture sample after sample instead of waiting for each tile to get all its samples done before rendering the next tile).

This happens only when you set the tile size bigger than the final resolution, or use GPU  rendering (GPU has only one rendering unit) or constrain your CPU to use only one rendering unit (CPU nowadays have at least 2, most have 4, 6 or 8, high-end CPU can have 32, 64, ... And render farms can have hundreds of them).

If there are multiple tiles to render, Blender shows only the tiles progression. I guess it's mainly because they want to keep the rendering stats as simple as possible.

Considering that some computers can have several dozens of rendering units at the same time, I guess it's better to have just a tile progression instead of 64 different render samples progression.
I also guess it could be nice to give an optional "advanced stats" mode, letting the user choose what he wants to see, but that's another topic.